00614nam a22002177i 450000500170000000800410001702200220005802200230008004100080010310000150011124500780012630000130020465000250021765000170024265000130025965000200027265100160029265300200030865500150032877300530034320141212093021.0890615s1989 sp gr 000 0 spa c a0300-4430 (papel) a1476-8275 (online) aeng1 aKERNIG, W.10aRESEARCH INTO THE EFFECTIVENESS OF PRIMARY EDUCATION IN ENGLAND AND WALES a13-29 p.14aEducación primaria14aEvaluación14aHistoria14aInvestigación14aReino Unido10aAcción social 4aDocumental0 tEARLY CHILD DEVELOPMENT AND CAREgVol. 44 (1989)